Improved Control Visage( Ghostwalk, p. 35)
You can change your ghost form's appearance.
Control Visage (Gh) , CHA 11,
You can change the appearance of your ghost body, clothing, armor, weapons, and equipment as a standard action as if using the alter self spell, although the changes are purely cosmetic and do not grant you any additional abilities (such as flight if you create wings). Thus, you could make yourself look like a hobgoblin ghost, an elf ghost, fat, thin, short, tall, and so on, although you still appear semitransparent.